EP0062911B1 - Verfahren und Vorrichtung zum Abschlacken - Google Patents

Verfahren und Vorrichtung zum Abschlacken Download PDF

Info

Publication number
EP0062911B1
EP0062911B1 EP82103056A EP82103056A EP0062911B1 EP 0062911 B1 EP0062911 B1 EP 0062911B1 EP 82103056 A EP82103056 A EP 82103056A EP 82103056 A EP82103056 A EP 82103056A EP 0062911 B1 EP0062911 B1 EP 0062911B1
Authority
EP
European Patent Office
Prior art keywords
suction head
force
slag
supporting means
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82103056A
Other languages
English (en)
French (fr)
Other versions
EP0062911A1 (de
Inventor
Hiroshima C/O Nippon Steel Corporation Soichi
Hirasawa C/O Nippon Steel Corporation Hidenao
Nakasai C/O Nippon Steel Corporation Yoshinori
Takayama C/O Nippon Steel Corporation Keiichi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0062911A1 publication Critical patent/EP0062911A1/de
Application granted granted Critical
Publication of EP0062911B1 publication Critical patent/EP0062911B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt
    • F27D3/1572—Equipment for removing or retaining slag for removing the slag from the surface of the melt by suction

Definitions

  • This invention relates to a method and apparatus for removing slags, and more particularly to a method and apparatus for removing, by means of vacuum suction, slags that are formed in the smelting process and float on the top of the bath of hot metal.
  • the hot metal obtained in the blast furnace or cupola contains considerable quantities of impurities such as sulfur, phosphorus and silicon. Commonly, such impurities are removed after being turned into slags in the ladle or mixer car. Methods and apparatuses that utilize vacuum suction for the removal of slags from the ladles etc. are disclosed in U.S. Patents 3,979,108, 4,077,615, 4,160,662 and 4,166,609.
  • the suction head Owing to the weight of its own and connected parts, the suction head is always attracted downward under the influence of gravity. Thus, there has so far been the risk of the suction head dipping in the slag or in the hot metal when the pressure applied by the level-control drive unit falls or the drive-cylinder piping or hose breaks. Usually, the suction head sprays a large quantity of water from its tip. Entrance of this water in the slag or the hot metal is very likely to cause a steam explosion that is heavily detrimental to the maintenance of safety.
  • An object of this invention is to provide a simple apparatus and a method of removing slags in which the suction head is kept from dipping in the slag or in the hot metal even when the force to maintain it at a predetermined level is either lowered or lost as a result of any trouble.
  • the vacuum-suction slag removing method always applies to the suction head an upward force that is greater than the force with which the suction head is attracted downward because of the weight of itself and connected parts. Then, a downward force is applied to the suction head to keep it in the desired position.
  • the suction head can only move upward, thereby avoiding the risk of plunging in the slag or the hot metal, even if the force to maintain it in the given position is lowered or lost.
  • the vacuum-suction slag removing method can keep the suction head from dipping in the slag or in the hot metal even when its level-control pressure source fails. Namely, it assures safe operation by precluding steam explosion and other hazards that may result if such dipping occurs.
  • the slag removing apparatus of this invention comprises a suction head, a suction source connected to the suction head, a four-joint link device holding the suction head, a member to support from below one of the hinged joints that make up the link device, and drive means to raise and lower the supporting member.
  • a load application device that always applies an upward force that is greater than the force with which the suction head is attracted downward under the influence of the weight of its own and connected parts.
  • This load application device keeps the suction head from dipping in the slag or the hot metal even when the supporting-member elevating means fails. Furthermore, the load application device is easy to construct by use of a balance weight or spring, thereby facilitating the application of this invention not only to new but also to existing equipments.
  • Fig. 1 shows the overall structure of a conventional desiliconizing apparatus to which this invention is applicable.
  • the removal of silicon from molten iron is effected in a mixer car or ladle 1.
  • the slag 3 formed by processing floats on the surface of the molten iron 2.
  • a suction head 4 connects to a separator tank 7 through a flexible pipe 5 and a pipe 6.
  • the separator tank 7 connects to a vacuum pump 8.
  • a suction-head holder 9 is provided by the side of the ladle 1.
  • the suction-head holder 9 comprises a four-joint link device 10, which, in turn, comprises four links 11, 12, 13, 14, with one end of the link 11 coupled to the suction head 5.
  • the base end of the link 12 is rotatably attached to a stand 16.
  • a movable beam 17 which extends laterally (from right to left in the drawing).
  • the movable beam 17 supports the link device 10 through a roller 18 that is rotatably attached to a hinged joint 15 of the links 13, 14.
  • a guide roller 19 is rotatably attached to each end of the movable beam 17.
  • the movable beam 17 is elevatably guided, through the guide rollers 19, along guide posts 20 erected on the stand 16.
  • a suction-head level detecting rod 25 is attached to the suction head 4. This detecting rod 25 determines the distance between the lower end of the suction head 4 and the surface of the slag 3 or molten iron 2 by means of changes in electric resistance and so on.
  • the vacuum pump 8 sucks up the slag 3 through the suction head 4.
  • the slag 3 becomes granulated under the water sprayed in the suction head 4 and reaches the separator tank 7 through the pipes 5, 6.
  • the granulated slag is separated from steam and other gases and then taken out of the tank 7.
  • the horizontal movement of the suction head 4 is controlled by a hydraulic motor 18' which is integrated with the roller 18 of the suction head holder 9 as shown in Fig. 2.
  • Reference numeral 18" designates a flexible hydraulic hose that allows the hydraulic motor 18' and roller 18 to move freely, in one piece, both vertically and horizontally.
  • the desired control is given through the link device 10 by a combination of the movable beam 17, cylinders 21, guide posts 20 and pump 24.
  • the level control is exercised by balancing upward and downward forces, the upward force being applied by actuating the cylinders 21 against the force with which the suction head 4 is attracted downward under the influence of the weight of its own and connected parts.
  • This invention offers a solution to this problem with the conventional slag-removing apparatuses.
  • This invention keeps the suction head from dipping in the slag or molten iron even in the case of mechanical failure by invariably applying an upward force to the suction head that is greater than the downward force generated by the weight of the suction head and connected parts.
  • Fig. 3 shows a first embodiment of this invention.
  • a gate-like frame 26 is mounted on the stand 16.
  • the lower part of the gate frame 26 constitutes a guide section 27 that guides the movable beam 17.
  • Pulleys 31, 32 are provided on the horizontal beam 28 of the gate frame 26 and the stand 16, respectively.
  • a wire rope 33 passes over the pulleys 31, 32.
  • One end of the wire rope 33 is connected to a bracket 34 fastened to the movable beam 17, with the other end attached to a balance weight 35. Consequently, the balance weight 35 always exerts an upward force on the movable beam 18.
  • the weight of the balance weight 35 is determined by taking into account the weight of the suction head 4, the members (such as the link device 10) connected thereto, and the movable beam 17. Namely, the balance weight 35 is designed to exert such a force that the suction head 4 is kept in the raised position when the hydraulic cylinder 29 applies no drive force upon the movable beam 17.
  • the balance weight 35 keeps the suction head 4 well apart from the top of the ladle 1, with the hydraulic cylinders 29 exerting no down-pulling force thereon.
  • the pump 24 supplies oil under pressure to the hydraulic cylinder 29 to lower the movable beam 17 against the force exerted by the balance weight.
  • a signal from the detecting rod 25 actuates an electromagnetic direction- switch valve 36 to hold the suction head 4 in that position.
  • the detecting rod 25 detects the change and actuates the switch valve 36 to lower the suction head 4 to a suitable position.
  • the detecting rod 25 detects the surface of the molten iron 2 and emits a corresponding signal to discharge the oil under pressure from the hydraulic cylinder 29. Consequently, the balance weight 35 raises the suction head 4 to the standby position.
  • the balance weight 4 keeps the suction weight 35 in the raised position. This keeps the suction head 4 from dipping in the slag 3 or molten iron 2.
  • Fig. 4 shows another embodiment of this invention.
  • a gate frame 37 rests on the stand 16.
  • the lower portion of the gate frame 37 constitutes a guide section 38 that guides the movable beam 17.
  • a gate-shaped spring holder 40 is fastened on the movable beam 17.
  • the pillars 41 of the spring holder 40 pass through the horizontal beam 39 of the frame 37 and carry a beam 42 fastened to the top thereof.
  • Coil springs 43 are placed between the horizontal beams 39 and 42, coaxially with the pillars 41.
  • the springs 43 act to raise the movable beam 17 through the spring holder 40.
  • the force of the spring is determined just as the weight of the balance weight 35 was determined in the preceding embodiment.
  • This embodiment operates in the same manner as the apparatus shown in Fig. 3 except the means that raises the movable beam 17.
  • Application of the upward force to the movable beam 17 can also be achieved by other means than the balance weight 35 in Fig. 3 and the coil springs 43 in Fig. 4, such as by driving the guide roller 19 by a motor or applying hydraulic force through a system separate from the pump 24 and hydraulic cylinder 29.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Claims (4)

1. Verfahren zum Entfernen von Schlacke (3), insbesondere in einem Schmelzprozeß, wobei eine vertikale Kraft auf eine Anordnung (17) zum Tragen einer Gelenkanordnung (10) ausgeübt wird, um einen Absaugkopf (4) in der gewünschten Position relativ zu der Oberfläche der Schlacke (3) zu halten, und wobei der Absaugkopf (4) mit Unterdruck beaufschlagt wird, um die auf dem heißen Metall (2) schwimmende Schlacke (3) abzusaugen, dadurch gekennzeichnet, daß der Absaugkopf (4) in der gewünschten Position gehalten wird, indem man konstant auf die Trägeranordnung (17) eine nach oben gerichtete Kraft ausübt, die größer als die Kraft ist, mit der der Absaugkopf (4) durch die Wirkung des Eigengewichts und des - Gewichts der mit ihm verbundenen Teile (5, 6) nach unten gezogen wird, und indem man gleichzeitig auf die Trägeranordnung (17) eine nach unten gerichtete Kraft ausübt, um der aufwärts gerichteten Kraft zu widerstehen.
2. Vorrichtung zum Entfernen von Schlacke, insbesondere nach einem Verfahren gemäß Anspruch 1, mit
a) einem Absaugkopf (4),
b) einer mit dem Absaugkopf (4) verbundenen Saugquelle (8)
c) einer Vier-Glenk-Hebelanordnung (10) zum Halten des Absaugkopfes (4),
d) einer Anordnung (17) zum Tragen eines der die Gelenkanordnung (10) bildenen Drehgelenke (15), und
e) einer Antriebsvorrichtung (23, 24, 29, 30) zum Anheben und Absenken der Trägeranordnung (17), gekennzeichnet durch
f) eine mit der Trägeranordnung (17) verbundene Lastausübungseinrichtung (26, 31, 33, 35; 37, 40, 43), wobei die Lastausübungseinrichtung konstant eine nach oben gerichtete Kraft ausübt, die größer als die Kraft ist, mit der der Absaugkopf (4) durch das Gewicht des Absaugkopfs (4) und der mit ihm verbundenen Teile (5, 6) nach unten gezogen wird.
3. Vorrichtung nach Anspruch 2, in der die Lastausübungseinrichtung umfaßt:
a) einen Torrahmen (26),
b) eine an dem Torrahmen (26) befestigte Rolle (31),
c) ein über die Rolle (31) laufendes Drahtseil (33), wobei ein Ende des Drahtseils (33) mit der Trägeranordnung (17) verbunden ist, und
d) ein an dem anderen Ende des Drahtseils (33) befestigtes Gegengewicht (35).
4. Vorrichtung nach Anspruch 2, in der die Lastausübungseinrichtung umfaßt:
a) einen Torrahmen (37),
b) einen an der Trägeranordnung (17) befestigten torförmigen Federhalter (40) und
c) Schraubenfedern (43), die zwischen den horizontalen Balken der Trägeranordnung (17) und dem Federhalter (40) angeordnet sind.
EP82103056A 1981-04-10 1982-04-08 Verfahren und Vorrichtung zum Abschlacken Expired EP0062911B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP56054198A JPS5841435B2 (ja) 1981-04-10 1981-04-10 サクシヨンヘツドの制御方法
JP54198/81 1981-04-10

Publications (2)

Publication Number Publication Date
EP0062911A1 EP0062911A1 (de) 1982-10-20
EP0062911B1 true EP0062911B1 (de) 1985-01-23

Family

ID=12963836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103056A Expired EP0062911B1 (de) 1981-04-10 1982-04-08 Verfahren und Vorrichtung zum Abschlacken

Country Status (6)

Country Link
US (1) US4416442A (de)
EP (1) EP0062911B1 (de)
JP (1) JPS5841435B2 (de)
AU (1) AU548280B2 (de)
BR (1) BR8202045A (de)
DE (1) DE3262013D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6231299U (de) * 1985-08-07 1987-02-25
KR100664452B1 (ko) 1998-02-03 2007-01-04 코닌클리케 필립스 일렉트로닉스 엔.브이. 코딩된 비디오 시퀀스들을 스위칭하는 방법 및 그것에 대응하는 장치
CN115709280B (zh) * 2022-11-25 2025-09-16 钢城集团凉山瑞海实业有限公司 一种简易的铁水铸锭自动扒渣装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242882Y2 (de) * 1974-07-24 1977-09-29
JPS599170B2 (ja) * 1976-06-11 1984-02-29 株式会社クボタ スカム吸引方法とその装置
JPS52151629A (en) * 1976-06-11 1977-12-16 Kubota Ltd Suction head
GB1550059A (en) * 1976-08-19 1979-08-08 Kubota Ltd Scum removing apparatus

Also Published As

Publication number Publication date
AU548280B2 (en) 1985-12-05
JPS5841435B2 (ja) 1983-09-12
EP0062911A1 (de) 1982-10-20
DE3262013D1 (en) 1985-03-07
US4416442A (en) 1983-11-22
BR8202045A (pt) 1983-03-22
AU8244982A (en) 1982-10-14
JPS57169593A (en) 1982-10-19

Similar Documents

Publication Publication Date Title
EP0062911B1 (de) Verfahren und Vorrichtung zum Abschlacken
ATE58228T1 (de) Verfahren und vorrichtung zum unterhalten der auskleidung eines ofengefaesses.
US3520351A (en) Starting bar arrangement for continuous casting machine
KR100400823B1 (ko) 전로내 다트 투입 장치를 위한 다트 공급장치
CN110963694B (zh) 一种浮法玻璃生产线过渡辊台挡帘自动提升装置
KR102140888B1 (ko) 주물 운반 장치
US3119889A (en) Steel making apparatus
JPH07280459A (ja) 排滓機の掻板レベル設定装置
JP2672803B2 (ja) 粘性生成物ヒータを備えたバレル持上げ装置
KR100815805B1 (ko) 고로 대탕도의 유선폰드 용융물 배출장치
US5374296A (en) Lance carriage
KR100469295B1 (ko) 용강래들 안착신호 감지장치
KR200198003Y1 (ko) 용융아연도금설비의 드로스 회수상자 이동장치
CN223189095U (zh) 一种卡脖水包安装辅助工具
SU933730A1 (ru) Установка дл порционного вакуумировани металла
CA1040833A (en) Apparatus for shifting trough of centrifugal casting machine
JPS54108331A (en) Method of installing machine room bed for prefabricated elevators
KR20090100156A (ko) 제강 레이들용 아르곤가스 자동주입장치
SU1337414A1 (ru) Способ ремонта доменной печи и устройство дл его осуществлени
KR100787582B1 (ko) 고로의 대탕도를 개폐하는 레벨장치
KR100287129B1 (ko) 전로내 다트 투입설비의 안전장치
JPS5940441Y2 (ja) 鋼帯の連続処理ライン
SU800206A1 (ru) Устройство дл замены патрубковВАКууМНОй КАМЕРы
JPH0534898Y2 (de)
KR900010331Y1 (ko) 제강용 전기로의 랜스 이송장치

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19821207

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19850123

REF Corresponds to:

Ref document number: 3262013

Country of ref document: DE

Date of ref document: 19850307

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950329

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950410

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950411

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960408

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19961227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST